spliting and showing YUV and RGB video Components

More Explanation-I have YUV and RGB uncompressed video with various formats.My aim is to split the Y U V and R G B components separately and render it to the screen.Now the problem is when I show the components separately of YUV video file the Y (Brightness) and U V (color components)cann't show properly.There is a blue back ground color when Y showing and Green Color when U and V Showing.Again i choose black as view area background color at the Initial stage.Eventhough the video frames shows properly when the Y U V components display jointly.The same logic apply for RGB video files.Every time it shows the proper output.My doubt is this Is there any mismatch with Background color and Y U and V components .Kindly send u All's idea's regarding that..................